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Braga AS, Meißner T, Schulz-Kornas E, Haak R, Magalhães AC, Esteves-Oliveira M. Enamel Caries Lesion Depth Obtained by Optical Coherence Tomography and Transverse Microradiography: A Comparative Study. Caries Res 2024; 58:502-510. [PMID: 38763130 DOI: 10.1159/000539406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 04/28/2024] [Indexed: 05/21/2024] Open
Abstract
INTRODUCTION Visual imaging of subsurface caries lesions is of vital interest in dentistry, which can be obtained by invasive radiography technique as well as by available non-destructive imaging approaches. Thus, as a first step toward the development of a new innovative approach, Spectral-domain optical coherence tomography (SD-OCT) was applied to detect the lesion depth in comparison to the established reference technique (transverse microradiography [TMR]). METHODS Bovine enamel specimens were demineralized for 5 days, following previous studies. For OCT, the resulting artificial lesions were scanned three-dimensionally (SD-OCT) and semi-automated measured (CarLQuant). For TMR, specimens were sectioned and the lesion depth was manually determined (Inspektor Research System). RESULTS The range of lesion depth detected with OCT was 24.0-174.0 μm (mouth rinse study), 18.0-178.0 μm (toothpastes study) and with TMR 59.2-198.0 μm (mouth rinse study), 33.2-133.4 μm (toothpastes study). We found a strong correlation between both methods in terms of lesion depth (Spearman rankwith outlierp < 0.001, Rho = 0.75, Spearman rankwithout outlierp = 0.001, Rho = 0.79). The two methods produce similar results (Passing-Bablok regression, 1.16). As deeper is the lesion, the smallest is the difference between both methods as indicated by Bland-Altman-plots. CONCLUSION Especially in the case of deep lesions, the values obtained by both methods are in agreement, and OCT can potentially substitute TMR to detect and assess lesion depth with the benefit of being non-destructive.
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Affiliation(s)
- Aline Silva Braga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Tobias Meißner
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Ellen Schulz-Kornas
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Marcella Esteves-Oliveira
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
- Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Bern, Switzerland
- Department of Restorative Dentistry and Endodontology, Justus-Liebig-University Giessen, Giessen, Germany
- Department of Conservative Dentistry, Periodontology and Endodontology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University of Tübingen, Tübingen, Germany
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Sato T, Tabata T, Akabane K, Zhao M, Khaled AHM, Hiraishi N, Sumi Y, Tagami J, Shimada Y. Noninvasive diagnostic method using optical coherence tomography detected a vulnerable dentin enamel junction created by phosphoric acid etching. Dent Mater J 2023:2022-246. [PMID: 37271540 DOI: 10.4012/dmj.2022-246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
To investigate the influence of phosphoric acid etching on the dentin enamel junction (DEJ) using optical coherence tomography (OCT). Human teeth were assigned to four groups: 1. control, no additional treatment (CT); 2. The primer of "SE Bond2" was applied (SE), 3. "Enamel Conditioner" was applied (EC), 4. "K-etchant syringe" was applied (KE). After treatment, the DEJ was observed using a laser microscope (CLSM), OCT, and scanning electron microscopy (SEM). Additionally, an ultimate tensile strength (UTS) test at the DEJ was performed. No cracks were observed by CLSM. In contrast, cracks were observed all samples by SEM. Additionally, OCT revealed a white line along the DEJ in all KE specimens and some EC specimens. The UTS test showed a significant difference between CT and KE. This study found that phosphoric acid etching may cause excessive demineralization and weaken the DEJ. This fragility was observed using a non-invasive diagnostic method using OCT.
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Affiliation(s)
- Takaaki Sato
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Tomoko Tabata
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Koudai Akabane
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Mengtian Zhao
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Abu Hasan Mohammad Khaled
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Noriko Hiraishi
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Yasunori Sumi
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
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Graul LM, Liu S, Maitland DJ. Theoretical error of sectional method for estimation of shape memory polyurethane foam mass loss. J Colloid Interface Sci 2022; 625:237-247. [PMID: 35716618 DOI: 10.1016/j.jcis.2022.06.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 06/03/2022] [Accepted: 06/09/2022] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Measuring in vivo degradation for polymeric scaffolds is critical for analysis of biocompatibility. Traditionally, histology has been used to estimate mass loss in scaffolds, allowing for simultaneous evaluation of mass loss and the biologic response to the implant. Oxidatively degradable shape memory polyurethane (SMP) foams have been implemented in two vascular occlusion devices: peripheral embolization device (PED) and neurovascular embolization device (NED). This work explores the errors introduced when using histological sections to evaluate mass loss. METHODS Models of the SMP foams were created to mimic the device geometry and the tetrakaidekahedral structure of the foam pore. These models were degraded in Blender for a wide range of possible degradation amounts and the mass loss was estimated using m sections. RESULTS As the number of sections (m) used to estimate mass loss for a volume increased the sampling error decreased and beyond m = 5, the decrease in error was insignificant. NED population and sampling errors were higher than for PED scenarios. When m ≥ 5, the averaged sampling error was below 1.5% for NED and 1% for PED scenarios. DISCUSSION/CONCLUSION This study establishes a baseline sampling error for estimating randomly degraded porous scaffolds using a sectional method. Device geometry and the stage of mass loss influence the sampling error. Future studies will use non-random degradation to further investigate in vivo mass loss scenarios.
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Affiliation(s)
- Lance M Graul
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, United States
| | - Shuling Liu
- Department of Statistics, Texas A&M University, College Station, TX, United States
| | - Duncan J Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, United States.
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Lai YJ, Takahashi R, Lin PY, Kuo L, Zhou Y, Matin K, Chiang YC, Shimada Y, Tagami J. Anti-Demineralization Effects of Dental Adhesive-Composites on Enamel-Root Dentin Junction. Polymers (Basel) 2021; 13:polym13193327. [PMID: 34641143 PMCID: PMC8512347 DOI: 10.3390/polym13193327] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 09/26/2021] [Accepted: 09/26/2021] [Indexed: 12/28/2022] Open
Abstract
Oral biofilm reactor (OBR) and pH cycling (pHC) artificial caries model were employed to evaluate the anti-demineralization effects of four composite filling systems on enamel-root dentin junction. Sixty-four enamel-root dentin blocks (6 mm × 6 mm × 2 mm) each with a cylindrical cavity were randomly assigned to the pHC and OBR group, then four subgroups (n = 8) and filled with either the Beautifil II (BEF, SPRG-filler-containing) or Estelite (EST) composite after the adhesive (either Single Bond Universal (SBU) or FL Bond II (FL, SPRG-filler-containing)). The demineralization lesions of filling interface were examined by micro-computerized tomography (μCT) and swept-source-optical coherence tomography (SS-OCT). According to the degree of interface damage, the caries lesions were sorted into four types: Type A and B (no attachment loss); Type C and D (attachment loss). EST/SBU showed the worst demineralization lesion and attachment loss (100% Type D), while BEF/FL exhibited the shallowest lesion depth (p < 0.05, 145 ± 45 μm on enamel, 275 ± 35 μm on root dentin) and no attachment loss (75% Type A and 25% Type B). Using FL adhesive alone does not effectively reduce enamel demineralization. BEF plays a leading role in acid resistance. The combination of BEF and FL showed a cumulative synergistic effect on anti-demineralization.
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Affiliation(s)
- Yu-Jung Lai
- School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei 10048, Taiwan;
- Dental Department, Division of Restorative and Aesthetic Dentistry, National Taiwan University Hospital, Taipei 100229, Taiwan;
| | - Rena Takahashi
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan; (R.T.); (Y.Z.); (K.M.); (Y.S.); (J.T.)
| | - Po-Yen Lin
- Department of Dentistry, School of Dentistry, National Yang Ming Chiao Tung University, Taipei 112, Taiwan;
| | - Ling Kuo
- Dental Department, Division of Restorative and Aesthetic Dentistry, National Taiwan University Hospital, Taipei 100229, Taiwan;
| | - Yuan Zhou
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan; (R.T.); (Y.Z.); (K.M.); (Y.S.); (J.T.)
| | - Khairul Matin
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan; (R.T.); (Y.Z.); (K.M.); (Y.S.); (J.T.)
| | - Yu-Chih Chiang
- School of Dentistry, Graduate Institute of Clinical Dentistry, National Taiwan University, Taipei 10048, Taiwan;
- Dental Department, Division of Restorative and Aesthetic Dentistry, National Taiwan University Hospital, Taipei 100229, Taiwan;
- Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan
- Correspondence: ; Tel: +886-2-23123456; Fax: +886-2-23831346
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan; (R.T.); (Y.Z.); (K.M.); (Y.S.); (J.T.)
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8549, Japan; (R.T.); (Y.Z.); (K.M.); (Y.S.); (J.T.)
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Kim Y, Jung GI, Jeon D, Wijesinghe RE, Seong D, Lee J, Do WJ, Kwon SM, Lee JH, Hwang JH, Kim HD, Lee KB, Jeon M, Kim J. Non-Invasive Optical Coherence Tomography Data-Based Quantitative Algorithm for the Assessment of Residual Adhesive on Bracket-Removed Dental Surface. SENSORS (BASEL, SWITZERLAND) 2021; 21:4670. [PMID: 34300410 PMCID: PMC8309505 DOI: 10.3390/s21144670] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 11/17/2022]
Abstract
The aim of this study was to quantitatively assess the residual adhesive on orthodontic ceramic bracket-removed dental surface. In orthodontic process, ceramic bracket was repeated debonding physically, then the adhesive remained on the dental surface. The residual adhesive caused a lack of adhesive strength between dental and ceramic bracket. Since commonly used adhesive in orthodontics is translucent, residual adhesive is hard to be detected with conventional microscopes. Therefore, 1310 nm center wavelength swept-source OCT system based on laboratory customized image processing algorithm was used for the precise detection of residual adhesive on tooth surface. The algorithm separates residual adhesive from dental surface by comparing the height of adjacent B-scan images, while providing color-scaled images emphasizing the thickness information of residual adhesive. Finally, the acquired results were compared with microscopic and adhesive remnant index scoring gold standards, while the comparison confirmed the potential merits and the improvements of the proposed method over gold standards.
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Affiliation(s)
- Yoonseok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Gu-In Jung
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Deokmin Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Ruchire Eranga Wijesinghe
- Department of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Pitipana, Homagama 10200, Sri Lanka;
| | - Daewoon Seong
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Jaeyul Lee
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Woo Jong Do
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Sung-Min Kwon
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Jong Hoon Lee
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Jun Ho Hwang
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Hyun Deok Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
- Institute of Advanced Convergence Technology, Kyungpook National University, Daegu 41061, Korea; (G.-I.J.); (W.J.D.); (S.-M.K.); (J.H.L.); (J.H.H.)
| | - Kyu-Bok Lee
- Advanced Dental Device Development Institute, Kyungpook National University, Daegu 41940, Korea;
- Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu 41940, Korea
| | - Mansik Jeon
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
| | - Jeehyun Kim
- School of Electronic and Electrical Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea; (Y.K.); (D.J.); (D.S.); (J.L.); (H.D.K.); (J.K.)
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